An olive field jacket and a sweatshirt are a great pairing worth incorporating into your casual arsenal. White canvas low top sneakers will immediately dress down an all-too-polished outfit. Keep this combo ready to go when spring arrives, and rest assured, you'll save a ton of time racking your brain for a look on more than one morning. When it comes to casual fashion tips for 30-something Millennial guys, this ensemble is a good look on almost any gent.